JPH06166379A - Mounting for engine - Google Patents

Abstract

PURPOSE:To absorb impact load at the time of automobile collision and at the same time reduce cost by simplifying the structure of the fitting portion of an engine in the case of the mounting of the engine. CONSTITUTION:An oblong hole 7 for engine fitting is provided at a center member 2 that is provided inside an engine room and runs along a vehicle longitudinal direction. The longitudinal side diameter of the oblong hole 7 is made larger than the diameter of the head portion of a bolt 8 to be inserted into the oblong hole 7, and the latitudinal side diameter of the oblong hole 7 is formed smaller than the diameter of the head portion of the bolt 8. As a result, at the time of vehicle collision, the oblong hole 7 is bent together with the center member 2 and widened and the bolt 8 that fits an engine comes to fall out easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine suspension system applied to an automobile.

[0002]

2. Description of the Related Art Conventionally, as a suspension system for an automobile engine in which a center member supporting an engine and arranged in the front-rear direction of a vehicle body is attached to a cross member or the like, there is one disclosed in Japanese Patent Publication No. 3-21568. is there. What is disclosed in this publication is that the rear portion of the center member is connected to a substantially central portion in the vehicle body left-right direction of the cross member that supports left and right front wheels, and the front portion of the center member is in front of the vehicle body of the cross member. Of the first cross member is connected to a substantially central portion in the left-right direction of the vehicle body, and an elastic member is interposed between the first cross member and the center member to softly connect the member to the elastic member. The front-rear rigidity lowering means for reducing the elasticity in the front-rear direction of the vehicle with respect to the elasticity in the left-right direction is provided.

By thus providing the front-rear rigidity lowering means at the connecting portion between the first cross member and the center member, the front-rear load acting on the center member impacts the first cross member when the vehicle suddenly starts and brakes. The first cross member is prevented from being deformed.

[0004]

In the above-mentioned conventional technique described above, the first cross member and the center member are softly connected to each other by interposing an elastic member between the first cross member and the center member. Since front-rear rigidity reducing means for reducing the elasticity in the vehicle front-rear direction relative to the direction elasticity is provided, the front-rear load acting on the center member is absorbed when the vehicle suddenly starts and brakes.
Since the impact load cannot be sufficiently absorbed when receiving the impact due to the frontal collision, the impact load due to the frontal collision may be absorbed by interposing the elastic member of the front-rear rigidity reducing means at the connecting portion between the center member and the engine. Conceivable,
In this case, the structure of the connecting portion between the center member and the engine becomes complicated, and the cost increases due to the use of the elastic member.

The present invention has been made to solve the above-mentioned conventional problems, and improves a connecting portion between a center member supporting an engine and the engine so that an engine mounting bolt can be removed from the center member in the event of a collision. It is an object of the present invention to provide a suspension system for an engine, which absorbs an impact load and simplifies the structure of a mounting portion of the engine to reduce the cost.

[0006]

As a means for solving the above problems, the present invention provides a center member along the longitudinal direction of a vehicle body in an engine compartment, and the center member has an engine along the longitudinal direction of the center member. A long hole for attachment is provided, the diameter of the long side of the long hole is formed larger than the diameter of the head of the bolt inserted into the long hole, and the diameter of the short side of the long hole is the head of the bolt. It is characterized in that it is formed smaller than the diameter of.

[0007]

According to the present invention, the center member provided in the engine compartment is provided with the elongated hole for mounting the engine along the longitudinal direction of the center member, and the diameter of the elongated hole on the longitudinal side is inserted into the elongated hole. Since the diameter on the shorter side of the long hole is smaller than the diameter on the shorter side of the bolt, the engine can be held by the diameter on the shorter side of the long hole. Further, when the vehicle collides, the elongated hole is bent together with the center member, and the elongated hole is widened so that the bolt mounting the engine can be easily removed.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. First, the mounting position of the center member supporting the engine will be described with reference to FIG. In the figure, 1 is an automobile and 2 is a center member. The center member 2 supports the engine 3. The center member 2 is arranged inside the engine compartment 4 along the front-rear direction of the vehicle body, and its front portion is fixed to the front subframe 5,
The rear part is fixed to the vehicle body side. Further, the engine 3 is mounted on the center member 2 via the engine mount bracket 6.
It is fixed to.

FIG. 1 is an enlarged view of a center member 2 and an engine mount bracket 6 for supporting an engine. In the figure, the left side is the rear part of the vehicle. The center member 2 is located at the center of the rear side of the center member 2.
The long hole 7 for mounting the engine along the longitudinal direction of
A long hole 7 through which a bolt 8 for screwing into a rear engine mount bracket 6 connected to the engine 3 is inserted is provided.

A bolt hole 9 is provided on the rear side of the center member 2, and the rear portion of the center member 2 is connected to the vehicle body by a bolt inserted through the bolt hole 9. A bolt hole 10 is also provided on the front side of the center member 2, and the front portion of the center member 2 is connected to a front subframe 5 (enlarged and shown) by a bolt inserted through the bolt hole 10. It In the figure, reference numeral 11 is a hole through which a bolt screwed into the front engine mount bracket 6 (see FIG. 12) is inserted, and reference numeral 12 is a bead.

FIG. 2 shows a cross section of the long hole 7. As shown in the figure, the center member 2 is U-shaped and is attached to the vehicle body or the like with the flange portion 13 facing downward. When the bolt 8 screwed into the engine mount bracket 6 is inserted into the long hole 7, the relation between the long hole 7 and the bolt 8 is as follows.

That is, as shown in FIGS. 3 and 4, the diameter of the long side of the long hole 7 is L1 and the diameter of the short side of the long hole 7 is
If the diameter of the head of the bolt 8 is D1 and the diameter of the threaded portion of the bolt 8 is D2, the relationship between them is L1> D1.
It becomes like ＞ L2 ＞ D2. That is, the diameter L1 on the long side of the long hole 7 is formed larger than the diameter of the head of the bolt 8 which is inserted into the long hole 7, and the diameter L2 on the shorter side of the long hole 7 is larger than the diameter of the head of the bolt 8. Also formed small. As a result, it is only necessary to form the long holes 7 satisfying this relation or to select the bolts 8 satisfying such relation.

Next, the operation of this embodiment will be described. In this way, the center member 2 provided inside the engine compartment 4 is provided with an elongated hole 7 for mounting the engine along the longitudinal direction of the center member 2, and the long side diameter L1 of the elongated hole 7 is set in the elongated hole 7. Since the diameter of the head of the bolt 8 to be inserted is larger than the diameter D1 and the diameter of the long side of the long hole 7 is smaller than the diameter D1 of the head of the bolt 8, the engine mount bracket 6 is inserted into the long hole 7. When the bolt 8 to be screwed is inserted, the engine 3 is held only by the diameter of the short side of the long hole 7. When the vehicle collides with the front part, the center member 2 is bent from the portion of the elongated hole 7 and the elongated hole 7 expands so that the head of the bolt 8 to which the engine 3 is attached can be easily removed.

This will be described with reference to the drawings. FIG. 5 shows a state before the collision of the automobile 1, in which the center member 2 is not deformed. FIG. 6 shows a state immediately after the collision, in which the center member 2 is not deformed and the bolt 8 cannot be removed yet. FIG. 7 shows a case where the center member 2 is deformed and the bolt 8 is pulled out after the collision. In this way, the amount of deformation of the center member 2 increases the amount of impact load absorption.

Although the center member 2 has a flat plate shape, it may have a shape in which the rear portion is lifted as shown in FIG. 8 instead of such a shape. The cross section of the elongated hole 7 at this time is as shown in FIG. In this case, the diameter L3 on the short side of the long hole 7 has a relationship of L2 <L3 in comparison with that of FIG. Further, as shown in FIGS. 10 and 11, a reinforcing plate 10 may be welded to a portion of the center member 2 having a rectangular cross section with a flange and excluding the elongated hole 7.

[0016]

As described above, according to the present invention, the center member provided in the engine compartment is provided with the elongated hole for mounting the engine along the longitudinal direction of the center member. The diameter of the long side of the bolt is larger than the diameter of the head of the bolt, and the diameter of the short side of the long hole is smaller than the diameter of the head of the bolt, so if you insert the bolt holding the engine into this long hole, Will be retained at the diameter of the short side of the long hole.

When the vehicle collides, the elongated hole is bent together with the center member, and the elongated hole is widened so that the bolt mounting the engine can be easily removed. As a result, when a frontal collision occurs, the impact load can be sufficiently absorbed. Further, since the engine can be directly mounted on the center member, the structure for mounting the engine on the center member can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view showing a state where a bolt is inserted into the one shown in FIG.

FIG. 4 is a bottom view of the bolt portion of FIG. 3;

FIG. 5 is a side view showing a state where the engine is attached to the center member.

FIG. 6 is a side view showing a portion of FIG. 5 that has collided and started to be deformed.

FIG. 7 is a side view showing that the bolt of FIG. 6 is further deformed and the bolt is removed.

FIG. 8 is a perspective view showing another example of the center member.

9 is a sectional view taken along line BB of FIG.

FIG. 10 is a perspective view showing still another example of the center member.

11 is a right side view of that of FIG. 10. FIG.

FIG. 12 is a right side view of the automobile for explaining the center member.

[Explanation of symbols]

 1 Automotive 2 Center Member 3 Engine 4 Engine Room 7 Long Hole 8 Bolt L1 Longitudinal Diameter L2 Shortest Diameter

Claims (1)

[Claims] 1. A center member is provided in the engine compartment along the longitudinal direction of a vehicle body, and an elongated hole for mounting an engine is provided in the center member along the longitudinal direction of the center member. An engine suspension device characterized in that the diameter of the head portion of the bolt inserted into the long hole is formed larger, and the diameter of the shorter side of the long hole is formed smaller than the diameter of the head portion of the bolt.